Description:
Colloidal silver particles were produced and characterized in the perfluorosulfonate membrane, Nafion 120. The size of the particles thus produced exceeds the size of the water clusters in the membrane. The hydrogen evolution reaction in the Cr 2+ H + system could be catalyzed by these membrane-anchored catalysts. The rate of this reaction was found to be first order in [Cr 2+ ] and the reaction was found to be mass transport limited. Analysis of the rate of this reaction indicates that only a small fraction of the particles' surface is accessible to the reactants.